Wall Lake, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 37.1 °F (low) to 58.1 °F (high). Annual precipitation averages 32.9 Inches. Wall Lake is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 9.5 °F | 27.4 °F | 0.74 in. |
| February | 13.6 °F | 32.1 °F | 0.98 in. |
| March | 24.9 °F | 45.7 °F | 1.84 in. |
| April | 35.8 °F | 59.3 °F | 3.57 in. |
| May | 48.4 °F | 70.5 °F | 4.7 in. |
| June | 59.3 °F | 80.6 °F | 5.22 in. |
| July | 62.9 °F | 83.5 °F | 3.69 in. |
| August | 60.2 °F | 81.2 °F | 4.34 in. |
| September | 51.1 °F | 75.6 °F | 2.9 in. |
| October | 38.6 °F | 62.3 °F | 2.37 in. |
| November | 25.8 °F | 46.1 °F | 1.4 in. |
| December | 15.5 °F | 32.6 °F | 1.13 in. |
| Annual | 37.1 °F | 58.1 °F | 32.88 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5a : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |